Oil-strainer



E. P. DU PONT.

OIL STRAINER.

APPLICATION FILED Nov. 4. 1919.

Pahnedsept'7,1920.

ELEUTHERE PAUL DU PONT, OF MONTCHANIN, DELAWARE. i

i OIL-STRAINEE.

estaran.

Specification of Letters Patent.

Patented Sept. 7, 1920.

Application filed November 4, 1919. Serial No. 835,626.

.To all whom t may concern:

Be it known that I, ELEUTHERE PAUL DU PONT, a citizen of the United States, residing at Montchanin, county of New Castle, and State of Delaware, have invented a new and useful lmprovement in Oil-Strainers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

rllhe object of my invention is to provide an improved form of oil filter for engines, whereby the lubricating oil will be thoroughly cleaned as it leaves the crank case and before being taken'up by the pump for distribution to the ,moving parts.

A further object nf my invention isto provide a filter which will retain all impurities and foreign matter extracted from the oil in such a manner as will prevent the filtering surfaces from becoming clogged or the foreign matter from being carried back into the 'crank case.

A further object of my invention is to construct the filter so as to permit the filtering surface and all collected impurities and foreign matter to be removed, for cleaning and disposal, while the engine is running and without in any way interfering with the oiling system or causing wastage of oil.

It will be understood that filters constructed in accordance with my invention will be adaptable to any form of engine wherein the lubricating oil is circulated through the engine.

Referring -to the accompanying drawings in which l have illustrated an embodiment of my invention in detail and in which like symbols refer to like parts in the various views,-

Figure l is a vertical sectional view .through the oil filter.

F ig. 2 is a cross-sectional View of the filter shown in F ig. l.

Fig. 3 is a vertical sectional view of a modified form of filter.

Fig. 4 is a plan view of the top of the filter opening.

The casing a cast integral with the engine crank case or provided with any suitable means for attaching to the crank case isl provided in its bottom with a cylindrical depression 5. A circular flanged orifice c is cut in the topof the casing and a notch d cut in the dange.

Wings e extend toward the center of the casing at angles to the side walls and divide the casing into inlet and outlet chambers. An. outlet 7 leads out from the bottom of the casing.

A cylindrical frame g, closed at the bot#A tom to form a cup and having -a cap Il on its top, is cut out throughout the greater part of its length and fitted with fine meshed curved screens z', one portion being left open as at j, F ig. 2. l

illhe frame g is placed in the casing through the orifice c in which it is fit and bears against the ends of wings e, the loottom of the frame fitting in the depression 5. A lug lc extends downwardly from the wider side of the edge of the cap and is adapted to enter notch d to position the unscreened portion j of the frame between the ends of wings e.

ln operation, the oil flows into the casing and passes into the cylindrical frame,

through the open portion j, between] the wings c. lt then passes from the frame through the screens z' and out of the casing through outlet pipe f as shown by the arrows, Fig. 2. Any di caught by the screens and drop into the cup at the bottom of the frame. The top of the casing being above the oil level, the frame and screens maybe readily removed without draining the oiling system, or, while the engine is in operation, by merely drawing them out through the orifice c. The

dirt may then be cleaned out of the cup and the frame replaced; the pin ic and notch d insure that the screens will be properly positioned, and the frame and screens will be kept in place by their own weight.

In Fig. 3, I have illustrated a modification of my invention for use when the location of the filter is such that the oil level in the crank case is higher than the top of the casing.

The casing Z, similar to casing a, is provided with a cylindrical extension m the top of which is above the oil level in the crank case. The cylindrical frame n, fitted with screens o, similar to the frame g, is extended to fit within the extension of the casing, and is provided with a cap p, a pin on the under rt or impurities are side of which fits in a notch g on the upper edge of the extension m to position the j screens.

ture, at one end, and in a cup, adapted to it into said depression, at the other, a curved screen partially surrounding said frame throughout the greater part of its length, and means to so position said frame thatthe unscreened portlon will be between said wings.

2. In an oil filter, in combination, a casing having an aperture in its top and a cylindrical depression in its bottom, wings extending into said casing, a cylindrical frame one end of which is formed into a closure for said aperture and the other end `of which forms a cup adapted to t into said depression, and a screen partially surrounding said frame.

` 3. In an oil filter, in combination, a casing having an extension on its upper wall in communication with its interior, a depres-` sion in its bottom below said extension, a removable frame closed at its lower end to form a cup adapted to fit into said depression and formed into a cap at its other end adapted to form a closure engaging said extension, wings dividing said casing into 'two intercommunicating compartments, and

a curved screen carried by said frame.

In an oil filter, in combination, a casing having an aperture in its top and a depression in its bottom, wings dividing said casing into intercommunicating compartments, .a removable frame having a cup formed on one end adapted to t in said depression and a cap formed on the other end adapted to form a closure for said aperture, a curved screen carried by said frame, and means to so position the frame in the casing that the screen will present its concave side to the passa of oii between the compartments.

5. an oil iilter, in combination, a casing providedv with an aperture in its top and having a depression in its bottom, wings extending into said casing, a frame terminating in a cap,forning a cover for said aperture, at one end, and in a cup, adapted to tit into said depression, at the other, a curved screen partially surrounding said frame throughout the greater part oi its iength, and means comprising a notch adjacent the edge of said aperture and a lug depending from said cap adapted to so position said frame that the unscrcened portion will be between said wings.

6. In an oil filter, in combination, a casing having a pair of vertically extending Wings extending from opposite walls and dividing the casing into an inlet chamber and an outlet chamber, the inner edges ot said wings being spaced apart to form an opening from one chamber to the other, and

a curved screen in the outlet chamber, saidI screen extending between the edges of said Wings and having an opening through which oil is adapted to flow direct from the inlet chamber between the edges of said wings into the interior of the screen.

7. In an oil filter, in combination, a casing and a vertically extending partition therein providing an inlet chamber and an outlet chamber, said partition having a vertically extending opening aiording communication between said chambers, the outlet chamber of the casing having an opening in its top, and a cylindrical strainer removable and insertible vertically through said opening and having a solid bottom and a `top forming, when in position in the casing, a closure for said opening, said strainer comprising a screen provided with a vertically extending opening registering with the opening in said partition.

In testimony of which invention, I have hereunto set my hand, at Wilmington,

Del., on this 29th daof October, 1919.

ELEUTHER PAUL DU PONT. 

